/*
 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
 *           (C) 2000 Antti Koivisto (koivisto@kde.org)
 *           (C) 2000 Dirk Mueller (mueller@kde.org)
 * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
 * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#ifndef SKY_ENGINE_PLATFORM_TRANSFORMS_TRANSLATETRANSFORMOPERATION_H_
#define SKY_ENGINE_PLATFORM_TRANSFORMS_TRANSLATETRANSFORMOPERATION_H_

#include "flutter/sky/engine/platform/Length.h"
#include "flutter/sky/engine/platform/LengthFunctions.h"
#include "flutter/sky/engine/platform/transforms/TransformOperation.h"

namespace blink {

class PLATFORM_EXPORT TranslateTransformOperation : public TransformOperation {
 public:
  static PassRefPtr<TranslateTransformOperation> create(const Length& tx,
                                                        const Length& ty,
                                                        OperationType type) {
    return adoptRef(new TranslateTransformOperation(tx, ty, 0, type));
  }

  static PassRefPtr<TranslateTransformOperation> create(const Length& tx,
                                                        const Length& ty,
                                                        double tz,
                                                        OperationType type) {
    return adoptRef(new TranslateTransformOperation(tx, ty, tz, type));
  }

  virtual bool canBlendWith(const TransformOperation& other) const;

  double x(const FloatSize& borderBoxSize) const {
    return floatValueForLength(m_x, borderBoxSize.width());
  }
  double y(const FloatSize& borderBoxSize) const {
    return floatValueForLength(m_y, borderBoxSize.height());
  }

  Length x() const { return m_x; }
  Length y() const { return m_y; }
  double z() const { return m_z; }

 private:
  virtual bool isIdentity() const override {
    return !floatValueForLength(m_x, 1) && !floatValueForLength(m_y, 1) && !m_z;
  }

  virtual OperationType type() const override { return m_type; }

  virtual bool operator==(const TransformOperation& o) const override {
    if (!isSameType(o))
      return false;
    const TranslateTransformOperation* t =
        static_cast<const TranslateTransformOperation*>(&o);
    return m_x == t->m_x && m_y == t->m_y && m_z == t->m_z;
  }

  virtual void apply(TransformationMatrix& transform,
                     const FloatSize& borderBoxSize) const override {
    transform.translate3d(x(borderBoxSize), y(borderBoxSize), z());
  }

  virtual PassRefPtr<TransformOperation> blend(
      const TransformOperation* from,
      double progress,
      bool blendToIdentity = false) override;

  virtual bool dependsOnBoxSize() const override {
    return m_x.isPercent() || m_y.isPercent();
  }

  TranslateTransformOperation(const Length& tx,
                              const Length& ty,
                              double tz,
                              OperationType type)
      : m_x(tx), m_y(ty), m_z(tz), m_type(type) {
    ASSERT(type == TranslateX || type == TranslateY || type == TranslateZ ||
           type == Translate || type == Translate3D);
  }

  Length m_x;
  Length m_y;
  double m_z;
  OperationType m_type;
};

}  // namespace blink

#endif  // SKY_ENGINE_PLATFORM_TRANSFORMS_TRANSLATETRANSFORMOPERATION_H_
